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Infrared spectra and resonance interactions of amide-I and II vibrations of α-helix

✍ Scribed by N. A. Nevskaya; Yu. N. Chirgadze

Publisher
Wiley (John Wiley & Sons)
Year
1976
Tongue
English
Weight
441 KB
Volume
15
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

Amide‐I and II vibrations of α‐helix have been treated on the basis of the perturbation theory in a dipole–dipole approximation. The infinite helix and its finite fragments have been considered as models. The calculated infrared spectra for the infinite helix are in good agreement with the spectra of synthetic polypeptides. In the case of finite fragments of the α‐helix, the characteristic contours of the amide‐I and II bands appear when the nuimber of peptide groups is about 10 and 6, respectively.

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